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Date: Tue, 8 Oct 2019 16:29:21 +0530
From: Martin Varghese <martinvarghesenokia@...il.com>
To: stephen@...workplumber.org, netdev@...r.kernel.org,
scott.drennan@...ia.com, jbenc@...hat.com,
martin.varghese@...ia.com
Subject: [PATCH iproute2] Bareudp device support
From: Martin <martin.varghese@...ia.com>
The Bareudp device provides a generic L3 encapsulation for tunnelling
different protocols like MPLS,IP,NSH, etc. inside a UDP tunnel.
Signed-off-by: Martin Varghese <martin.varghese@...ia.com>
---
include/uapi/linux/if_link.h | 12 ++++
ip/Makefile | 2 +-
ip/iplink_bareudp.c | 154 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 167 insertions(+), 1 deletion(-)
create mode 100644 ip/iplink_bareudp.c
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index d36919f..a3a876d 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -578,6 +578,18 @@ enum ifla_geneve_df {
GENEVE_DF_MAX = __GENEVE_DF_END - 1,
};
+/* Bareudp section */
+enum {
+ IFLA_BAREUDP_UNSPEC,
+ IFLA_BAREUDP_PORT,
+ IFLA_BAREUDP_ETHERTYPE,
+ IFLA_BAREUDP_SRCPORT_MIN,
+ IFLA_BAREUDP_EXTMODE,
+ __IFLA_BAREUDP_MAX
+};
+
+#define IFLA_BAREUDP_MAX (__IFLA_BAREUDP_MAX - 1)
+
/* PPP section */
enum {
IFLA_PPP_UNSPEC,
diff --git a/ip/Makefile b/ip/Makefile
index 5ab78d7..784d852 100644
--- a/ip/Makefile
+++ b/ip/Makefile
@@ -11,7 +11,7 @@ IPOBJ=ip.o ipaddress.o ipaddrlabel.o iproute.o iprule.o ipnetns.o \
iplink_bridge.o iplink_bridge_slave.o ipfou.o iplink_ipvlan.o \
iplink_geneve.o iplink_vrf.o iproute_lwtunnel.o ipmacsec.o ipila.o \
ipvrf.o iplink_xstats.o ipseg6.o iplink_netdevsim.o iplink_rmnet.o \
- ipnexthop.o
+ ipnexthop.o iplink_bareudp.o
RTMONOBJ=rtmon.o
diff --git a/ip/iplink_bareudp.c b/ip/iplink_bareudp.c
new file mode 100644
index 0000000..479ad1c
--- /dev/null
+++ b/ip/iplink_bareudp.c
@@ -0,0 +1,154 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#include <stdio.h>
+
+#include "rt_names.h"
+#include "utils.h"
+#include "ip_common.h"
+
+#define BAREUDP_ATTRSET(attrs, type) (((attrs) & (1L << (type))) != 0)
+
+static void print_explain(FILE *f)
+{
+ fprintf(f,
+ "Usage: ........ bareudp dstport PORT\n"
+ " ethertype ETHERTYPE|PROTOCOL\n"
+ " [ext_mode]\n"
+ " [srcportmin SRCPORTMIN]\n"
+ "\n"
+ "Where: PORT := 0-65535\n"
+ " : ETHERTYPE|PROTOCOL := ip|mpls|0-65535\n"
+ " : SRCPORTMIN : = 0-65535\n"
+ );
+}
+
+static void explain(void)
+{
+ print_explain(stderr);
+}
+
+static void check_duparg(__u64 *attrs, int type, const char *key,
+ const char *argv)
+{
+ if (!BAREUDP_ATTRSET(*attrs, type)) {
+ *attrs |= (1L << type);
+ return;
+ }
+ duparg2(key, argv);
+}
+
+static int bareudp_parse_opt(struct link_util *lu, int argc, char **argv,
+ struct nlmsghdr *n)
+{
+ __u16 dstport = 0;
+ __u16 ethertype = 0;
+ __u16 srcportmin = 0;
+ bool extmode = 0;
+ __u64 attrs = 0;
+
+ while (argc > 0) {
+ if (!matches(*argv, "dstport")) {
+ NEXT_ARG();
+ check_duparg(&attrs, IFLA_BAREUDP_PORT, "dstport",
+ *argv);
+ if (get_u16(&dstport, *argv, 0))
+ invarg("dstport", *argv);
+ } else if (!matches(*argv, "extmode")) {
+ check_duparg(&attrs, IFLA_BAREUDP_EXTMODE,
+ *argv, *argv);
+ extmode = true;
+ } else if (!matches(*argv, "ethertype")) {
+ NEXT_ARG();
+ check_duparg(&attrs, IFLA_BAREUDP_ETHERTYPE,
+ *argv, *argv);
+ if (!matches(*argv, "mpls")) {
+ ethertype = 0x8847;
+ check_duparg(&attrs, IFLA_BAREUDP_EXTMODE,
+ *argv, *argv);
+ extmode = true;
+ } else if (!matches(*argv, "ip")) {
+ ethertype = 0x0800;
+ check_duparg(&attrs, IFLA_BAREUDP_EXTMODE,
+ *argv, *argv);
+ extmode = true;
+ } else {
+ if (get_u16(ðertype, *argv, 0))
+ invarg("ethertype", *argv);
+ }
+ } else if (!matches(*argv, "srcportmin")) {
+ NEXT_ARG();
+ check_duparg(&attrs, IFLA_BAREUDP_SRCPORT_MIN,
+ *argv, *argv);
+ if (get_u16(&srcportmin, *argv, 0))
+ invarg("srcportmin", *argv);
+
+ } else if (matches(*argv, "help") == 0) {
+ explain();
+ return -1;
+ } else {
+ fprintf(stderr, "bareudp: unknown command \"%s\"?\n", *argv);
+ explain();
+ return -1;
+ }
+ argc--, argv++;
+ }
+
+ if (!dstport || !ethertype) {
+ fprintf(stderr, "bareudp : Missing mandatory params\n");
+ return -1;
+ }
+
+ if (dstport)
+ addattr16(n, 1024, IFLA_BAREUDP_PORT, htons(dstport));
+ if (ethertype)
+ addattr16(n, 1024, IFLA_BAREUDP_ETHERTYPE, htons(ethertype));
+ if (extmode)
+ addattr(n, 1024, IFLA_BAREUDP_EXTMODE);
+ if (srcportmin)
+ addattr16(n, 1024, IFLA_BAREUDP_PORT, srcportmin);
+
+ return 0;
+}
+
+static void bareudp_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[])
+{
+
+ if (!tb)
+ return;
+
+ if (tb[IFLA_BAREUDP_PORT])
+ print_uint(PRINT_ANY,
+ "port",
+ "dstport %u ",
+ rta_getattr_be16(tb[IFLA_BAREUDP_PORT]));
+
+ if (tb[IFLA_BAREUDP_ETHERTYPE])
+ print_uint(PRINT_ANY,
+ "port",
+ "dstport %u ",
+ rta_getattr_be16(tb[IFLA_BAREUDP_ETHERTYPE]));
+ if (tb[IFLA_BAREUDP_SRCPORT_MIN])
+ print_uint(PRINT_ANY,
+ "port",
+ "dstport %u ",
+ rta_getattr_u16(tb[IFLA_BAREUDP_SRCPORT_MIN]));
+
+ if (tb[IFLA_BAREUDP_EXTMODE]) {
+ print_bool(PRINT_ANY, "extmode", "extmode ", true);
+ return;
+ }
+}
+
+static void bareudp_print_help(struct link_util *lu, int argc, char **argv,
+ FILE *f)
+{
+ print_explain(f);
+}
+
+struct link_util bareudp_link_util = {
+ .id = "bareudp",
+ .maxattr = IFLA_BAREUDP_MAX,
+ .parse_opt = bareudp_parse_opt,
+ .print_opt = bareudp_print_opt,
+ .print_help = bareudp_print_help,
+};
--
1.8.3.1
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